Ekuklanyeni kwe PCB ibhodi, ngokwanda okusheshayo kwemvamisa, kuzoba nokuphazamiseka okuningi okuhlukile kunokwakhiwa kwebhodi le-PCB yemvamisa ephansi. Kunezici ezine zokuphazamiseka, kufaka phakathi umsindo wokuphakelwa kwamandla, ukuphazanyiswa kolayini wokuhambisa, ukuhlangana nokuphazamiseka kwe-electromagnetic (EMI).

Ungakuxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB

Kunezindlela eziningana zokuqeda umsindo wokuphakelwa kwamandla ekwakhiweni kwe-PCB

1. Naka imbobo ebhodini: imbobo edlulayo yenza ukuthi ungqimba lokuphakelwa kwamandla ludinga ukufaka indawo yokuvula ukuze kushiye isikhala somgodi odlulayo. Uma ukuvulwa kocingo lokuphakelwa kwamandla kukhulu kakhulu, nakanjani kuzothinta iluphu yesiginali, isignali iphoqeleka ukudlula, indawo yeluphu iyanda, nomsindo uyanda. Ngasikhathi sinye, uma imigqa eminingana yesiginali ihlanganiswe eduze kokuvula futhi yabelana nge-loop efanayo, impedance ejwayelekile izodala i-crosstalk. Bheka Umfanekiso 2.

Ungaxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB?

2. Ulayini wokuxhuma udinga umhlaba owanele: isiginali ngayinye idinga ukuthi ibe neluphu yesiginali yayo ephathelene nayo, nendawo eyi-loop yesiginali ne-loop incane ngangokunokwenzeka, okungukuthi, isignali ne-loop kufanele zihambisane.

3. amandla kagesi e-analog nawedijithali ukwahlukanisa: amadivayisi asebenzisa imvamisa ephezulu ngokuvamile azwela kakhulu emsindweni wedijithali, ngakho-ke bobabili kufanele bahlukaniswe, baxhumane ndawonye emnyango wokuphakelwa kwamandla, uma isignali yonkana yezingxenye ze-analog nezidijithali amagama, ungabeka iluphu ngaphesheya kwesiginali ukunciphisa indawo yeluphu. Ububanzi be-digital-analog busetshenziselwa i-loop yesiginali.

Ungakuxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB

4. Gwema ukugqagqana kwamandla kagesi ahlukene phakathi kwezendlalelo ezahlukahlukene: ngaphandle kwalokho, umsindo wesifunda ungadlula kalula ekuhlanganiseni kwe-capacitive capacitive.

5. ukuhlukaniswa kwezinto ezizwelayo: njenge-PLL.

6. Beka ulayini wamandla: Ukunciphisa iluphu yesiginali, beka ulayini wamandla onqenqemeni lwentambo yesiginali ukunciphisa umsindo.

Ungaxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB?

Ii. Izindlela zokuqeda ukuphazamiseka komugqa wokudlulisa ekwakhiweni kwe-PCB zimi kanje:

(a) Gwema ukuyekiswa kwe-impedance kolayini wokudlulisa. Iphuzu le-impedance enganqamuki iphuzu lokuguqulwa kolayini wokudlulisa, njengekhoneni eliqondile, ngembobo, njll., Kufanele kugwenywe ngangokunokwenzeka. Izindlela: Ukugwema izingakhona eziqondile zomugqa, ngangokunokwenzeka ukuya ku-45 ° Angle noma i-arc, i-Angle enkulu nayo ingaba; Sebenzisa okumbalwa ngezimbobo ngangokunokwenzeka, ngoba umgodi ngamunye ukuyekiswa kwe-impedance. Izimpawu ezisuka kungqimba olungaphandle zigwema ukudlula kusendlalelo sangaphakathi futhi okuphambene nalokho.

Ungakuxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB？

(b) Ungasebenzisi imigqa yesigxobo. Ngoba noma imuphi umugqa wenqwaba ungumthombo womsindo. Uma ulayini wenqwaba mfushane, ungaxhunyaniswa ekugcineni kolayini wokudlulisa; Uma ulayini wenqwaba umude, kuzothatha ulayini omkhulu wokudlulisa njengomthombo futhi kukhiqize ukubonakaliswa okuhle, okuzokwenza inkinga ibe yinkinga. Kunconywa ukuthi ungayisebenzisi.

3. Kunezindlela eziningana zokuqeda i-crosstalk ekwakhiweni kwe-PCB

1. Usayizi wezinhlobo ezimbili ze-crosstalk uyanda ngokwanda kwe-impedance yokulayisha, ngakho-ke ulayini wesiginali ozwela ekuphazanyisweni okubangelwa yi-crosstalk kufanele unqanyulwe kahle.

2, ngangokunokwenzeka ukwandisa ibanga phakathi kolayini bezimpawu, inganciphisa ngempumelelo i-capacitive crosstalk. Ukuphathwa komhlaba, isikhala phakathi kwezintambo (njengemigqa yesiginali esebenzayo kanye nolayini bomhlaba wokuzihlukanisa, ikakhulukazi esimweni sokugxuma phakathi kolayini wesiginali nomhlabathi kuya esikhaleni) futhi kunciphise ukwehliswa kokuhola.

3. I-crosstalk enamandla ingabuye yehliswe ngempumelelo ngokufaka ucingo lwaphansi phakathi kolayini besiginali abasondelene, okumele baxhumeke ekwakhiweni kwabo bonke ubude bekota yobude.

4. Nge-crosstalk enengqondo, indawo yeluphu kufanele incishiswe futhi, uma kuvunyelwe, kuqedwe iluphu.

5. Gwema i-loop yokwabelana ngesiginali.

I-6, naka ubuqotho besiginali: umklami kufanele aqaphele ukuxhumana okuphelile kunqubo ye-welding ukuxazulula ubuqotho besiginali. Abaqambi abasebenzisa le ndlela bangagxila kubude be-microstrip woqweqwe lwethusi oluvikelwe ukuze bathole ukusebenza okuhle kobuqotho besiginali. Kuzinhlelo ezinezixhumi ezixinene kusakhiwo sokuxhumana, umklami angasebenzisa i-PCB njengesiginali.

4. Kunezindlela eziningana zokuqeda ukuphazanyiswa kwamandla kagesi ekwakhiweni kwe-PCB

1. Nciphisa amaluphu: Iluphu ngayinye ilingana ne-antenna, ngakho-ke kudingeka sinciphise inani lamaluphu, indawo yamaluphu nomphumela we-antenna wezihibe. Qiniseka ukuthi isignali inendlela eyodwa kuphela yeluphu kunoma yimaphi amaphuzu amabili, gwema izingodo zokufakelwa futhi usebenzise ungqimba wamandla lapho kungenzeka khona.

2, ukusefa: kulayini wamandla nakulayini wesiginali kungathatha ukusefa ukunciphisa i-EMI, kunezindlela ezintathu: ukuqeda amandla capacitor, isihlungi se-EMI, izingxenye zikazibuthe. Isihlungi se-EMI siboniswa ku.

Ungakuxazulula kanjani ukuphazanyiswa kwedizayini ephezulu ye-PCB？

3, ukuvikela. Njengomphumela wobude benkinga kanye nezindatshana eziningi zokuvikela izingxoxo, akusasingeniso esinqunyiwe.

4, zama ukunciphisa ijubane lamadivayisi wefrikhwensi ephezulu.

5, ukwandisa njalo dielectric ibhodi PCB, kungavimbela okusezingeni eliphezulu imvamisa izingxenye ezifana yokudlulisela umugqa eduze ibhodi kusuka imisebe kwangaphandle; Khulisa ukushuba kwebhodi le-PCB, ukunciphisa ukushuba komugqa we-microstrip, kungavimbela ulayini we-electromagnetic spillover, kungavimbela nemisebe.